Grate



(Na Model) 3 Sheets-Sheet 1.

G. W. WALKER.

GRATE.

Na; 248,533. Patented Oct. 18,1881.

mew

n. warms, Pmwmmnwr. war-mm. a c.

(No Model.) 3 Sheets-Sneet 2.

G. W. WALKER.

GRATE.

3 sheets-sheet 3.

(No Model.)

G. W. WALK-ER.

GRATB.

Patented Oct 18,- 1881.

henmr NlTE STATES PATENT OFFICE.

GEORGE W. WALKER, 0F MALDEN, MASSACHUSETTS.

GRATE.

SPECIFICATION forming part of Letters Patent No. 248,533, dated October 18, 1881.

Application filed June16,1881. (Flo model.) 7

To all whom it may concern Be it known that I, GEORGE W. WALKER, of Malden, county of Middlesex, State of Massachusetts, haveinvented an Improvement in Grates, of which the following description, in connection with the accompanying drawings, is a specification.

My invention, embodied in a dumping-grate, has for its object to enable a portion of the grate to be vibrated or rocked for a short distance independently of the dumping-frame, or normally motionless portion of the grating for the purpose of removing the loose ashes, and in its further movement to positively engage the said dumping-frame and cause it to be turned therewith to dump the fuel or material supported thereon. The vibrating portion of the grateis shown as a longitudinal rib provided with arbors or journals atits ends, one of them being squared to receive an operating crank or handle, the said rib having laterally-projecting fingers or grate-bars, which normally remain horizontal, forming a portion of the bottom of the grating upon which the fuel rests, and which, as the said rib is rocked on its arbors, alternately rise above and fall below the said level to agitate the fuel and shake out the ashes. The dumping-frame also consists of a central rib, also provided with laterally-extended bars placed alternately between the bars orfingers of thepivoted rib, and normallylying in the same plane therewith, the two together, when atrest,foriningahorizontal grating. The said dumping-frame IS made channel-shaped, to rest upon the pivoted rib, and its bars are shown as connected by a longitudinal bar at their outer ends. its central rib is provided with holes or passages to permit air to enter, to prevent overheating. The central rib of the pivoted grate and the channel portion of the dam pin g-i'rame made to receive it are properly constructed to permit a limited rocking movement of the said pivoted grate independent of the dumping-frame, and at the end of such movement the said rib engages the side of the said channel and acts positively thereon, so that if turned further on its journals in the proper direction itwill cause the said frame to accompany it, to thereby overturn the entire grating and dump the material thereon in the usual manner. When the pivoted portion of the grate thus positively en gages the dumping-frame at the end of its independent movement it moves the said frame a small distance laterally, so that in the rapid rocking or vi.- brating movement of the pivoted portion of the grate a slight lateralvibration is imparted to the dumping portion thereof, which assists in rattling out the ashes.

Figure 1 is a plan view of the entire grating embodying my invention; Fig. 2, a plan View of the pivoted portion; Fig. 3, an under-side view of the dumping frame; Fig. 4, a transverse section in line a: :0, Fig. 1; Fig. 5, a perspective view of the grate, a portion of the dumping-frame beingbroken away; and Fig. 6, a modification to be referred to.

The main or vibrating portion of the grate (shown in Fig. 2) consists of a longitudinal rib, a, provided with journals 1) b atits ends, to be supported in suitable bearings, the latter being square, as shown at D or otherwise adapted to be engaged bya suitable wrench or crank to rotate or rock it in its bearings. The said rib a is provided with a series of laterally-projecting fingers or grate-bars, c, and has mounted upon it the dumping-frame, which consists of a central longitudinal rib, d, provided with bearing-points e, and having a series of laterally-projecting bars, f, which are shown as connected at the outer ends by longitudinal bars 9 g, the latter at the front of the grate being made lighter than the former and not extending the entire length, so that the rear side, g, slightly overbalances the front side, g, of the dumping portion of the grate, which thus tends to turn its bearing-points 0 until it comes to rest on the usual supporting projection, h,inthe fixed portion of the structure.

The upper faces of the fingers or bars a are above the level of the central portion or rib, a,

of the vibrating part of the grate, thus forming a channel or depression, 2, to receive the central rib, d, of the dumping-frame, and the bars f of the said dumping-frame are extended below the said central rib, as shown in Figs. 3 and 4, they each having a projecting flange or head, 3, at the end connectedwith the said rib, the bars 0 of the rocking port-ion lying in the spaces 4. between the said heads 3, and being thus maintained in an intermediate position between the bars f of the dumpingframe. A channel, 5, is thus formed in the under side of the dumping-frame, to receive the rib or of the vibrating portion of the grate, and a sufficient space is left between the said rib a and the inner ends of the bars f, as shown in Fig. 4, to permit a rocking or vibratory movement of the said rib a with its fingers a independent of the dumping-frame efg g, as shown in dotted lines. At the end or" this independent vibratory movement the rib a eugages the inner ends, 3, of the bars f of the said dumping-frame, and causes a slight lateral movement thereof, rattling the ashes from the fire. The rib a, with its fingers, may thus be rocked back and forth, causing the said fingers at each side of the rib a alternately to rise up into the fuel, and also to agitate orjar the dumping-frame, to thus thoroughly rattle out the ashes. When the rib a is turned far enough in the proper direction to engage the dumping-frame, as just described, it will in its further movement positively rotate the said dumping-frame with it, the whole grating then turning on the journals 1) I) to dump the material resting thereon.

The dumping-frame is provided with lugs m, extending below the rib a, to receive a pin, a, extended across the said rib, and operating to prevent the dumping-frame from falling away from the said rib a in case it is inverted in the process of dumping.

The longitudinal rib g, connecting the front ends of the barsfof the dumping-frame is, for the sake of lightness, made of less depth vertically than the said bars, and is provided with downward projections 1 opposite the ends of the fingers c of the rocking portion, to prevent the fuel fromfalling down or becoming wedged in at theendsof the said fingers, and the bar 9, at the rear side of the grate, is made of equal depth with the barsf, thus accomplishing the same result.

It is obvious that the rib d of the dumpingframe might be arranged to lie beneath the rib a. of the pivoted portion, it being hung thereon by any suitable connecting pin or link-as the pin a. (See Fig. 6.)

The rib a of the dumping-frame is provided with holes 2' for the passage of air to keep the said rib cool and prevent it from. becoming warped.

I claim-- A 1. The herein-described grating, consisting of a pivoted rib, provided with lateral fingers or bars, and a dumping-frame recessed on its under side, mounted thereon and arranged, as described,to permit alimitedindependentrocking movement of the said pivoted portion, and to be positively engaged and rotated thereby in its further movement, substantially as described.

2. In a grate, the longitudinal rib provided with journals at its ends, and with laterallyprojecting bars or fingers raised above the said rib, as described, to form a channel or depression along it to receive and support the co-opcrating dumping-frame, substantially as described.

3. In a grating, the herein-described dumping-frame, consisting of a longitudinal rib, (l, and bars f, laterally projecting therefrom, the said bars being arranged, as described,to leave a channel between the said rib and their ends connected therewith, for the reception of a cooperating pivoted grating, substantially as described.

4. The combination of the pivoted rib, with its lateral fingers or bars, and the dumpingfra-me consisting of a longitudinal rib and lateral bars connected therewith, and provided with heads or flanges spaced to receive the said fingers between them, substantially as described.

5. The dumping-frame provided with bearing-poin ts c, and lateral bars connected at their ends by longitudinal bars, combined with the pivoted rib, adapted as described, to sustain the said frame, its projecting fingers lying be tween the said lateral and longitudinal bars, substantially as described.

6. The pivoted rib having the laterally-projecting fingers, combined with the longitudinal rib of the dumping-frame supported thereon, and having lateral bars, and the shallow longitudinal connecting-bar g, which is provided with projections g opposite the ends of the said fingers, substantially as and for the purpose described.

7. The pivoted rib and its lingers, combined with the dumping-frame provided with a channel to receive the said rib, and the lugs m, and pins 11, to retain the said frame in place on the said rib, substantially as described.

In testimony whereofl have signed my name to this specification in the presence of two subscribing witnesses.

GEO. \V. WALKER.

Witnesses:

W. H. SresroN, B. J. NoYns. 

